unlucky moonie, it's sods law that if your lights are going to stop working, it'll be at the mot.
I was lucky, i've finally found a garage that will mot according to age, and won't try applying 2009 standards to a 30 y/o car.
My only advisory was "vehicle structure has slight corrosion", not bad for a 30 y/o vehicle. The guy even reckoned that my flexi pipes were original, not sure myself though.